Agility Australia is our favourite agility organisation. Their courses and rules are based on the US Nadac, but without many of the changes introduced by NADAC over the last year or so.
The courses are open and free flowing, and elite performance is primarily about being able to shave seconds off the time with precise handling, rather than being able to negotiate tricky traps.
They emphasise safety; there are no spread or broad jumps and no table obstacles. And they place a premium on sportsmanship; speaking harshly to your dog or to the judge will get you eliminated.
All of the events are significantly different. Agility Standard has a full range of equipment and requires distance handling, Jumping has only jumps and tunnels, Tunnellers has only tunnels, Weavers has tunnels and weaves, Touch and Go has contact obstacles and tunnels.